It's a weird comparison really. I'm not sure I even agree at all that's it's more improbable. As much as I can be critical of Rad, that is perhaps because she achieved something so mind bogglingly improbably when winning the USO as a qualifier, that it may take a lifetime to see something similar and something she only could achieve due to underlying talent (that she now cannot unlock through poor decisions). Yes Alc was on a two week purple patch, but we have seen that with nadal, djoko, fed, sampras etc etc etc.